The development of green printing ink for inkjet printing

Zulkarnain, Wan Putri Najihah (2024) The development of green printing ink for inkjet printing. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Due to its large emissions of volatile organic compounds (VOCs), petroleum-based ink consumption is detrimental to the environment. Petroleum-based ink is a non-renewable and non-biodegradable material. It is discovered that by producing printing inks based on renewable and biodegradable resources can overcome this issue. Transesterification is the process to produce methyl ester for ink printing with the reaction of waste cooking oil (WCO) and methanol with the presence of KOH as the catalyst. Thus, the objective of this study is to examine the reaction's conversion efficiency and the composition of ME, which influences the reaction temperature and time during the transesterification of methyl ester at a given WCO to methanol ratio (1:3). This study discusses the process that was performed to evaluate the properties of the C-H bonding in WCO and methyl ester (ME) and produce a green printing ink (GPI) with a lower viscosity that can be used in inkjet printing through the transesterification process. As the outcome of this study, the mixture of ink produced from methyl ester, carbon black, and Cetyltrimethylammonium bromide (CTAB) as surfactant in the designated composition can achieve Green Printing Ink with a viscosity 19.00cP appropriate to inkjet printing and a lower C-H bond as determined by FTIR spectra. The transesterification reaction with reaction temperature at 70°C and reaction time at 60 minutes produces the lowest viscosity of methyl ester to become the binder. The resulting data showed that the sample produced during the transesterification process while utilizing a variable reaction temperature and reaction duration, all the while keeping the catalyst concentration constant and the molar ratio of methanol to WCO at 3:1. Overall, the success of the printing performance has been proved by the ability to print an image on paper substrate.

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